SUPERWORLD ELECTRONICS (S) PTE LTD

NOTE : Specifications subject to change without notice. Please check our website for latest information.

PG. 7

17.06.2008

9-1. Recommended PC Board Pattern

9. SOLDERING AND MOUNTING :

1

43

2

3.70

1.90

PC board should be designed so that products are not sufficient

Products shall be positioned in the sideway direction against

the mechanical stress to prevent failure.

under mechanical stress as warping the board.

WIREWOUND TYPE COMMON MODE FILTER

W4 SERIES

Figure 3. Hand Soldering

Gradual Cooling

230

150

Over 1min.

Within 3secs.

e) Use a 20 watt soldering iron with tip diameter of 1.0mm

Products attachment with soldering iron is discouraged due to the inherent process control limitations. In the event that

a soldering iron must be employed the following precautions are recommended.

products, wave soldering of large size products is discouraged. Recommended temperature profile for wave soldering

seen by the circuit when immersed in the molten solder wave, typical at 240°C. Due to the risk of thermal damage to

Wave soldering is perhaps the most rigorous of surface mount soldering processes due to the steep rise in temperature

Recommended temperature profiles for re-flow soldering in Figure 1.

Mildly activated rosin fluxes are preferred. The minimum amount of solder can lead to damage from the stresses caused

by the difference in coefficients of expansion between solder, chip and substrate. Our terminations are suitable for all

wave and re-flow soldering systems. If hand soldering cannot be avoided, the preferred technique is the utilization of hot

9-2.1 Solder Re-flow :

Figure 1. Re-flow Soldering

Over

1min.

Preheating

Over

1min.

(446)

(302)

150

230

Gradual Cooling

Within 10secs.

280

Preheating

Soldering

Soldering

cooling

Natural

f) Limit soldering time to 3 secs.

d) 1.0mm tip diameter (max)

b) 280°C tip temperature (max)

c) Never contact the ceramic with the iron tip

9-2.3 Soldering Iron (Figure 3) :

a) Preheat circuit and products to 150°C.

9-2.2 Solder Wave :

is shown in Figure 2.

Note :

air soldering tools.

9-2. Soldering

Gradual Cooling

Over 2mins.

Within 3secs.

Figure 2. Wave Soldering

cooling

Natural

Soldering

230

150

Preheating

250

Natural

cooling